just started my 900 gallon plywood build. mocked after gators design with a few of my own tricks....10'x4'x3' inner dimesions. the window im using is from vldesigns 1500 that was dismantled. im also puting in a 3x3 window on the side. its just my dad and i working on it and had only two days working on it so far but got the shell built. everything is 12'' on center. 2x6 stand, 2x8 floor and 2x4 walls. the plywood is 10x4, 3/4 inch good on one side. 640 3'' screws and about 200 2'' screws. it will be against one wall and drywalled around to be an in wall tank.